Adjustable fire-draft blower and screen



(No Model.)

P. W. 'HURNDALL.- ADJUSTABLE EIEE DRAFT BLowEE AND SCRE N.

Patented Oct. 19, 1897.

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- UNITED STATES Fries;

ATEN'I ADJUSTABLE FIRE-DRAFT'BLOWER AND SCREEN.

SPECIFICATION forming part of Letters Patent No. 592,114, datedjOctober19, 1897. Applicatibn filed May 21,1397. $eria1No. 637,589. (No modem"To aZZ whom it may cortcern: I

Be itknown that I, PERCY W. HURNDALL, a

citizen of England, residing in the city and county of San Francisco,State of California, have invented an Improvement in AdjustableFire-Draft Blowers and Screens; and Thereby declare the following to bea full, clear, and exact description of the same.

My invention relates to a device for the controlling of the draft, offires and grates and to act as a screen therefor.

It consists in details of construction which will be more fullyexplained by reference to the accompanying drawings,i'n which- Figure 1is a front view of a grate with my screen attached to it. Fig. 2 is aside view of the device to operate the screen.

A represents a grate, of any usual or suitable construction, adapted forthe burning of fuel.

In my device I have shown a spring-actuated roller B, j ournaledtransversely at some suitable point above the grate or fireplace andhaving a screen 0 adapted to roll upon this roller. This screen may bemade of thin plates of metal flexibly connected together and of suchWidth that they will coil and uncoil upon the roller, or the screen maybe made of asbestos, or any suitable fire-resisting fabric or material.

Upon each side of the grate are vertical posts D, and the lower edge ofthe screen has slides E, adapted to move up and down upon theguide-posts and retain the lower edge of the screen in position withrelation to the grate. This screen when drawn down to the bottom,leaving a small opening beneath,

forms a blower or draft device to direct the air through the fuel in thegrate, and when the fuel is properly ignited the screen may be raised soas to expose the fire and to cut off the direct draft through the bottomof the grate, leaving only the ordinary natural draft,

or, if preferred, a portion of the screen may be journaled below and soarranged as to be raised from below, thus cuttingofi the bottom draftentirely, and it may be made to serve as a screen to prevent the heatfrom being projected into the room to a greater degree' than is desired:In the present case I have shown the roller-shaft projecting through thesides of its journal-supports F,

and having upon the outer end a ratchetwheel G and a disk H.

I is a lever fulcrumed in line with the. disk H, the end having the endadjacent to'the disk concaved, so that it may form contact with andpress upon the disk. Upon the side of this part of the lever is a pawlN, pivoted upon the same shaft or axis with the lever. The lever has apin .I projecting from its side and adapted to engagea projection K,formed upon the pawl, so that when the lower end of the lever is drawnbackwardly the part above the fulcrum-pin is pressed inwardly, so thatthe inner end may contact with the disk, while the pin engaging the stopon the pawl turns the pawl about its fulcrum and disengages the innerend from the ratchet-wheel. This leaves the spring-actuatedroller-shaft, upon which the screen is coiled, free to move and thescreen will be coiled up automatically. The inner end of the lever maybe pressed against the disk with any desired force to regulate. thespeed with which the screen moves or stop it altogether, and when thelever is released a spring L, acting upon the pawl, forces its pointinto contact with the ratchet and this arrests the movement of thescreen.

The screen may be ornamented with colors I claim as new, and desire tosecure by Letters Patent, is=--' v 1. In a screen and draft-blower forgrates and fireplaces, the combination with a springactuated roller anda curtain, of a means for holding the curtain and controlling the coil-'ing of the same, consisting of a ratchet-wheel on the axis of theroller, a pawl to engage said wheel and a fulcrumed brake-levertocontrol the roller, said lever provided with means for engaging andreleasing the pawl from its engagement with the ratchet-wheelsimultaneously with the application of the brake. v

2. The combination with a spring-actuated roller and its curtain, of ameans for controlling the coiling of the curtain consisting of apawl-and-ratchet mechanism and a brakelever having a part to retard therotation of about its fulcrum whereby the pawl is disengaged from theratchet, a disk fixed upon the roller-shaft by the side of theratchet-wheel and adapted to be engaged by the inner end of theactuating-lever when the pawl is disengaged whercby the movement of thescreen is controlled.

In witness whereof I have hereunto set my hand.

PERCY XV. I'IURNDALL. Witnesses:

S. II. NoURsE, JESSIE C. BRoDIE.

